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How to convert x,y coordinates to an angle with JavaScript?

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Sometimes, we want to convert x,y coordinates to an angle with JavaScript.

In this article, we’ll look at how to convert x,y coordinates to an angle with JavaScript.

How to convert x,y coordinates to an angle with JavaScript?

To convert x,y coordinates to an angle with JavaScript, we use the Math.atan2 method.

For instance, we write

const deltaX = x2 - x1;
const deltaY = y2 - y1;
const rad = Math.atan2(deltaY, deltaX);
const deg = rad * (180 / Math.PI);

to get deltaX and deltaY by subtracting the x and y coordinates.

Then we call Math.atan2 with deltaY and deltaX to get the angle in radians.

Then we convert it to degrees by multiplying that by 180 / Math.PI.

Conclusion

To convert x,y coordinates to an angle with JavaScript, we use the Math.atan2 method.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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